On Sun, 2014-02-02 at 20:56 -0800, Christoffer Dall wrote:

On Thu, Jan 30, 2014 at 11:54:46AM -0500, Christopher Covington wrote:

quoted

Hi Ian,

On 01/30/2014 11:11 AM, Ian Campbell wrote:

quoted

mach-virt has existed for a while but it is not written down what it actually
consists of. Although it seems a bit unusual to document a binding for an
entire platform since mach-virt is entirely virtual it is helpful to have
something to refer to in the absence of a single concrete implementation.

I've done my best to capture the requirements based on the git log and my
memory/understanding.

While here remove the xenvm dts example, the Xen tools will now build a
suitable mach-virt compatible dts when launching the guest.

[...]

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+The platform may also provide hypervisor specific functionality
+(e.g. PV I/O), if it does so then this functionality must be
+discoverable (directly or indirectly) via device tree.

I think it would be informative to provide pointers here to commonly used
paravirtualized devices, especially VirtIO PCI/MMIO.

I disagree: that would only encourage limited testing or assumptions
about these specific devices when really this platform is just a
bare-bones platform driven by device tree which should make no
preference, whatsoever, about which devices are used with the platform.

Thanks, I think this is exactly what I was failing to express coherently
last week ;-)

Ian.